Cowpea fresh-keeping agent and method for keeping cowpea fresh by same

Abstract

The invention relates to a cowpea fresh-keeping agent and a method for keeping cowpea fresh by the cowpea fresh-keeping agent. The fresh-keeping agent is prepared by adding 1.0-1.5 g of sodium alginate, 2-3 g of citric acid, 1-2 g of ascorbic acid and 0.5-1 g of procyanidine in 1 kg of pure water or cool plain boiled water sequentially, and stirring while adding, wherein the later agent is added after the former agent is completely dissolved, until the agents are completely dissolved. The method for keeping cowpea fresh by the cowpea fresh-keeping agent comprises the following steps: removing impurities from the fresh cowpeas, washing and drying the cowpeas, soaking the cowpeas for 10 min with a chlorine dioxide solution with the concentration of 150 ppm, then fishing up the cowpeas and drying, placing the cowpeas into 50 DEG C hot water to be treated for 3-5 min, cooling in pure water, and fishing up the cowpeas and drying, placing in the fresh-keeping agent to soak for 5-10 min, fishing up the cowpeas and drying, packaging the cowpeas by a polyvinyl chloride film, and storing at 8-12 DEG C. The raw materials for the fresh-keeping agent are easy to obtain; the fresh-keeping method is simple and feasible; and the cowpea fresh-kept by the method can be kept fresh for 21-25 days.

Description

technical field [0001] The invention relates to a fresh-keeping liquid for cowpea and a method for keeping fresh-keeping cowpea by using it. Background technique [0002] Cowpea is an important leguminous plant, and it is a staple vegetable that goes on the market in summer and autumn in my country, and is cultivated in most parts of my country. Cowpea has tender green color, thick meat pods, juicy and delicious, rich in protein, fat, vitamins and minerals, etc., and is deeply loved by consumers. Because cowpea is harvested in the high temperature season, it is not easy to store, and the pods will age rapidly, become soft and yellow, lose water and shrink, and rot, resulting in serious loss, which is difficult to meet the needs of the market. And cowpea output is big, and production seasonality is strong, makes the contradiction of off-peak season of market supply more prominent, and production peak season is oversupplied, so need to develop the method for keeping fresh of ...

AI Technical Summary

Problems solved by technology

Because cowpea is harvested in the high temperature season, it is not easy to store, and the pods will age rapidly, become soft and yellow, lose water and shrink, and rot, resulting in serious loss and it is difficult to meet the needs of the market

Moreover, the large yield of cowpea and the strong seasonality of production make the contradiction between the off-peak season and the peak season of market supply more prominent, and the supply exceeds demand in the peak production season, so it is necessary to develop a method for keeping cowpea fresh.